.header {position: relative;}
.header > div {position: absolute;}
.header-drawer {width: 1500px;height: 500px;background: url("http://1080pw.com/download/10733/Cartoon/hd_wallpaper_tom_and_jerry-1500x500.jpg") 0 0 repeat-x;-moz-animation: header-drawer 30s infinite linear;-webkit-animation: header-drawer 30s infinite lnear;-ms-animation: header-drawer 30s infinite linear;-o-animation: header-drawer 30s infinite linear;}
@-moz-keyframes header-drawer {0% { background-position:0 0; }100% { background-position: 1500px; }}
@-webkit-keyframes header-drawer {0% { background-position:0 0; }
  100% { background-position: 1500px; }
}
@-ms-keyframes header-drawer {
  0% { background-position:0 0; }
  100% { background-position: 1500px; }
}
@-o-keyframes header-drawer {
  0% { background-position:0 0; }
  100% { background-position:1500px; }
}